摘要
根据1974—2010年实测资料，在分析渭河高含沙洪水特点的基础上，研究了渭河高含沙洪水对潼关高程的影响。结果表明：1974—2010年渭河华县站高含沙洪水主要来自泾河，场次高含沙洪水泥沙的中值粒径一般为0.01~0.03 mm，极细沙含量占全沙的比例都在20%以上；潼关站发生高含沙洪水时，若来水以渭河为主，则小流量时潼关断面淤积，且主要淤积在主槽，潼关高程以抬升为主，大流量时潼关断面展宽冲深，潼关高程以下降为主；潼关高程还受到华县站流量、含沙量、水量等因素的影响。最后，提出了渭河高含沙洪水影响潼关高程变化的综合影响条件。
According to the measured data between 1974 and 2010, based on characteristics of hyperconcentration sediment flood in Wei River, the influence of hyperconcentration sediment flood to the Tongguan elevation was studied. The results show that hyper-concentration sediment flood of Huaxian station between1974 and 2010 mainly comes from Jinghe River, the median particle is between 0.01 -O. 03 mm, and the proportion of very fine sand content is more than 20%. For hyper-concentration sediment flood mainly coming from Huaxian station, in the condition of little flow, Tongguan section is deposited, deposition is concentrated in channel, and Tonggnan elevation increases. In the condition of big flow, Tong- guan section are broaden and scoured deeply, Tongguan elevation is reduced and at the same time, it is also influenced by the factors of discharge, sediment concentration and water volume of Huaxian Station. Finally, the Comprehensive condition of influence of hyperconcentration sediment flood in Wei River to the Tongguan elevation is put forwarded.
出处
《人民黄河》
CAS
北大核心
2014年第4期6-8,11,共4页
Yellow River
基金
中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2011-16)
水利部公益性行业科研专项(201001012)
关键词
河道冲淤
潼关高程
高含沙洪水
渭河
river channel scouring and silting
Tongguan elevation
hyperconcentration sediment flood
Weihe River
